The expression is . To subtract means add .

To add fractions the denominators must be equal.

Find the least common denominator (LCD).

Find the Least Common Multiple of 2 and 4.

Multiples of 2: 2,4,6,8,10,12............

Multiples of 4: 4,8,12,16,20,...........

The least common multiple of 2 and 4 is 4.

Rewrite each fraction with a common denominator of 4. \ \

Rewrite fractions using the LCD 6.

Denominators are same, write sum of numerators over denominator.

                              (LCM is 4)

                                       (Add: )

The value of the expression is .